This is a Passport Size refill that uses kraft paper. An original paper is used for this notebook where both the rough texture of the kraft paper and writing suitability is achieved. The rough feeling you get from using pencils and ballpoint pens is great, but water-based pens and fountain pens also go well in the sense that it makes it difficult for the ink to sink through and stain the other side of the paper. Please use this refill freely for a scrap book or as a memo. It can even be used to draw by making full use of the characteristic of kraft paper.